Application : Silicon trap material
Type : Ni, Mo
Shape : Cylindrical Extrudates

For silicon removal, Axens has recently developed a catalyst for this specific application. The surface area and the texture of support have been optimised.

When processing a coker naphtha, the end of cycle is most often linked to the limited silicon adsorption capacity of the catalyst. Indeed, when silicon is not present, typical cycle lengths for naphtha hydrotreating catalysts are above 3 to 4 years. But, when processing coker naphtha, the cycle length is below 1 year and even less. Moreover, the silicon breakthrough will irreversibly damage the downstream catalysts (reforming, isomerisation …).

Our new silicon trap catalyst is a NiMo type. Consequently it is very active for hydrolysis of organic silicon but it also promotes the saturation of the remaining diolefins and olefins and the nitrogen removal.

Thanks to its optimised texture and porosity, the ACT961 catalyst has a very high silicon retention.